LAKE ESCARPMENT MORAINES. 655 



taraugus Creek is shown in PL XIX. In the valley-Uke depression at the 

 north end of Lake Chautauqua two distinct moraines are found. An outer 

 weak one extends from Little Chautauqua Creek southeastward to within 2 

 miles of the head of Lake Chautauqua, and there turns abruptly northward 

 along the west side of Inlet Creek and joins the main belt east of Prospect. 

 The main belt leads northeastward along the north side of Little Chautau- 

 qua Creek to its source, and there becoming united with the outer belt, 

 continues through the south part of Portland Township to the valley-like 

 depression in which Bear Lake stands, where it again separates from the 

 outer belt. The outer belt, which here also is weak, leads eastward to Bear 

 Lake, and then returns northward to join the inner or main belt on the high 

 divide between Bear Lake Valley and Cassadaga Creek. The inner belt 

 leads directly northeast across Bear Lake Valley, passing about a mile 

 north of the lake. The united belt swings around the north end of the 

 high divide between Bear Lake and Cassadaga Creek, and takes a south- 

 ward coui'se into the Cassadaga Valley at Upper Cassadaga Lake. 



From Cassadaga Valley two moraines lead eastward. A weak outer 

 one passes from Cassadaga Village northeastward to Arkwright, while a 

 strong inner one leads from Upper Cassadaga Lake to the same point, a 

 portion of its course being along the north side of the westward-flowing 

 part of Canadaway Creek. 



The combined belt leads eastward from Arkwright past Arkwright 

 Summit to the valley or depression in which West Mud Lake lies, and 

 includes that lake in its outer border. It then makes an abrupt northward 

 turn along the face of the hills east of West Mud Lake, and crosses over 

 to the valley-like depression in which East Mud Lake lies. In this depres- 

 sion there was less- lobation of the ice margin than in similar valleys to the 

 west, the course of the moraine being eastward across the valle}' and the 

 uplands east of it to Slab Creek, a headwater tributary of the Conewango, 

 and thence over another ridge south of Perrysburg to the broad valley of 

 the Conewango, which afforded the old line of discharge for the Upper 

 Allegheny. 



In crossing this valley the moraine takes a northeastward course tlirough 

 Dayton to South Cattaraugus Creek, coming to that stream about midwaA" 

 between Gowauda and Cattaraugus. It is very ill defined east of this creek 

 for 3 or 4 miles, but seems to follow the east bluff northward nearl}' to the 



